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Lusonectes
''Lusonectes'' (meaning "Portuguese swimmer") is an extinct genus of plesiosaurid from Lower Jurassic (Toarcian stage) deposits of Alhadas, Portugal. It is known from the holotype MG33, a partial skull and articulated mandible. It was found by Henri Émile Sauvage, a French paleontologist, in the 19th century from the São Gião Formation, near Murtede, Portugal. It was first named by Adam S. Smith, Ricardo Araújo and Octávio Mateus in 2012 and the type species is ''Lusonectes sauvagei''. The generic name is derived from the prefix ''Luso'' meaning "Portuguese" and ''nectes'' ("swimmer" in Greek). The specific name honors Henri Émile Sauvage. It is based on a single autapomorphy, a broad triangular parasphenoid cultriform process that is as long as the posterior interpterygoid vacuities, and also on a unique character combination. Cladistic analysis of Jurassic plesiosauroids found ''Lusonectes'' to be "microcleidid elasmosaurs", equivalent to the clade Plesiosauridae after Ketchum and Benson, 2010. ''Lusonectes'' is the only diagnostic plesiosaur from Portugal to date.
==See also==
* List of plesiosaur genera
* Timeline of plesiosaur research
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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